Interlocking brake-shoe and back therefor.



J. D. GALLAGHER INTERLOCKING BRAKE SHOE AND BACK .THEREFOR.

Patented Dec. 19,1916;

APPLICATION FILED AUG-911913- MIAMI J. D. GALLAGHER. INTERLOCKING BRAKE SHOE AND BACK THEREFOR.

1,208,943; Patentd Dec. 19,1916.

I 2 SHEETS-SHEET 2- APPLlCATION FILED AUG- 9, I913- lnve tor: b I ZQL/QQKK y W ED STA s 1TENT on ro. I

JOSEPH D. GALLAGHER, OF GLEN RIDGE, NEW JERSEY, AS SIGNOR TO THE AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF WILMINGTON, DELAWARE, A CORPORA- TION OF DELAWARE.

INTERLOCKING BRAKE-SHOE AND BACK THEREFOR.

Specification of Letters Patent.

Patented Dec. 19, 1916.

Application filed August 9, 1913. Serial No. 783,909.

To all whom it may concern;

Be it known that I, JOSEPH D. GALLA- GHER, a citizen of the United States, and a resident of Glen Ridge, in the county of Essex and State of New Jersey, have made and invented certain new and useful Improvements in Interlocking Brake-Shoes and Backs Therefor, of which the following is a specification.

My invention relates to break shoes designed for use upon railway vehicles, and particularly to that type or kind commonly known and referred to as an interlocking shoe, and in which no waste material or scrap results when the shoe is in use, this result being attained by securing a partially worn shoe to the wearing face of an unworn shoe, and the two then used as a unitary structure until the partially worn shoe is completely worn away. Thereafter, and when the unworn shoe above referred to shall have been partiallyv worn away, it is removed from its support and in turn placed in front of and secured to another unworn shoe and completely worn away, and so on indefinitely.

The objects of my invention are to provide a brake shoe of the type above referred to which shall be simple in construction, and one in which the worn and unworn sections may be more readily assembled, and more securely held together than has heretofore commonly been the case; to provide a shoe in which a single back. of tough and strong material, such as wrought iron or steel, may be used repeatedly to support new body portions to be worn away in succession as above explained, and to otherwise improve upon and increase the efficiency of brake shoes of the type above referred to. I

With the above and other objects in view, my invention consists in the improved brake shoe, and back'therefor, described in the following specification, and specifically claimed in the concluding claims, and in such varlations and modifications thereof as will be obvious to those skilled in the art to which my invention relates.

In the drawings, accompanying and forming a part of this application, and wherein the preferred embodiment of my inventlon is illustrated; Figure 1 is a view showing my improved'brake shoe in side elevation; Fig.

2 is a view showing the same in plan; Fig.

taken upon a plane indicated by the line 44, Fig. 1; Fig. 5 is'a view taken upon a central vertical plane extending longitudinally of the shoe, with a fragment of a section lying in front of said plane shown in order to illustrate certain details of construction; Fig. 6 is a view showing the face of two of the sections of the shoe; and Fig. 7 is a view taken upon a vertical plane extending longitudinally of the shoe and showing the same secured to a brake head.

The body portion of my improved brake shoe is made up of a plurality of sections, similar to one another, and each extending longitudinally of the shoe.

Referring to the drawings,'the reference numerals 10, 11 designate two rear sections extending longitudinally, and throughout the length, of the shoe and lying side by side, while the numerals 12,13 designate two other similar sections located in front of the sections 10,11 and held together, and supported, by said first-mentioned sections.

Each of the sections above referred to is provided with a longitudinally extending lug upon its rear face as shown at 14, 15, 16 and 17, which lugs are widest at their middle portion and taper toward each end as shown in Fig. 2, and are undercut or grooved along their sides as shown at 18. These lugs are provided with projections 19 adjacent their free ends, and, as will be understood from Figs. 2, 3 and 4;, when two sections such as 10, 11 are placed side by side, the lugs of said sections will merge with one another and form in effect a single lug projecting from the rear face of the body formed by said sections.

The sections above referred to are also provided with recesses in their front faces, two of which are designated by the reference numerals 20, 21, which recesses correspond in size and form with the lugs upon the rear faces or backs of the sections; and are assembled by first placing the lower or front sections side by side with their lugs'in contact, the rear sections being then placed upon the front sections and moved sidewise and into contact with one another, whereby the lugs of the front sections become locked within the recesses of the rear sections, and the front sections thus held together and supported by the rear sections.

\Vhile Figs. 1 to 6 illustrate a shoe having a body portion comprising two like superposed sets of sections, that is, a shoe in which the lower sections are provided with recesses, in actual service the lower sections will be such as have been partially worn out in service, as is illustrated in Fig. 7 in which the reference numeral 22 designates a brake head or equivalent support, and 23 a suitable key whereby the shoe is secured to the head.

The several sections, constituting the body portion of my improved brake shoe, are supported from a brake head and held together to form a unitary structure by means of a detachable back in engagement with the rear sections, said back being shown as comprising two similar back sections 24:, located one at each side of the center of the shoe, and having each an opening with tapered or inclined sides 25, and within which the ends of the lugs of the rear sections lie when the shoe is assembled, as best shown in Fig. 2. The sides 25 of the back sections are beveled to fit in the undercut sides or grooves 18 of the lugs, as shown in Figs. 3 and a, and extend throughout a considerable portion of the length of the lugs, thus providing an extensive area of contact, and a strong connec tion between the back and the rear sections of the shoe body.

From the above it follows that the rear sections are secured to the sections of the back by means of lugs upon their rear face, and that the front sections are secured to the rear sections by means of the recesses upon the rear sections and the lugs upon the front sections. It will also be seen that as the sections of the back are forced longitudinally of the shoe and toward one another, the rear sections will be forced sidewise, and into firm contact, which movement will be transmitted to the front sections through the recesses of the rear sections and lugs upon the front sections, all the sections comprising the body of the shoe being clamped and held together and supported by the detachable back of the shoe.

i The back sections 24 are made preferably from wrought iron, or mild steel plate stock, of from to :1 in thickness or thereabout, and the outer ends bent upward to provide end-thrust absorbing stops 26, with which the ends of the brake head engage as shown in Fig, 7 the projection 19 forming a central lug for preventing sidewise movement of the ends of the shoe. The inner adjacent ends of the back sections are also bent upward, as shown at 27, and provided with openings 28 through which the securing key 23 extends when the shoe is in use to thereby support the same from the brake head, the two upwardly extending portions 26 thus constituting a key lug.

Having thus described and explained my invention, I claim'and desire to secure by Letters Patent:

1. A brake shoe, the entire body of which comprises two substantially like faces and divided longitudinally throughout its length, the two faces of said body being adapted to fit side by side, said body being provided with lugs on its rear faces and corresponding recesses on its wearing faces, and means for detachably holding the sections together.

2. In a brake shoe, a body portion comprising two sections arranged side by side and extending longitudinally of the shoe; a supporting back detachably secured to said body; and a second body portion detachably secured to said first-mentioned body portion.

3. In a brake shoe, a body portion comprising a plurality of sections extending longitudinally of the shoe; a supporting back to which said sections are detachably sccured; and a second body portion comprising a like number of sections similar to said firstmentioned sections, and which second body I portion is detachably secured to said firstmentioned body portion.

4:. In a brake shoe, a body portion comprising two sections arranged side by side and extending longitudinally of the shoe; a detachable back through which said body is supported; means carried by said back for forcing said body sections toward one another; a second body portion secured to said first-mentioned body portion and comprising two sections arranged side by side and extending longitudinally of the shoe; and

means carried'by said first-mentioned body portion for forcing the sections of said second-mentioned body portion toward one another. v

5. In a brake shoe, a body portion com prising two sections arranged side by side and extending longitudinally of the shoe and which body portion is provided with a lug upon its rear face and with a recess corresponding in size and form with said lug upon its front face; and a detachable back having means for enga ing the lug aforesaid to thereby support sai body portion.

6. In a brake shoe, a body portion comprising two sections arranged side by side and extending longitudinally of the shoe and which body portion is provided with a lug upon its rear face and with a recess corre sponding in size and form with said. lug upon its front face; and a detachable back having an opening into which the lug aforesaid may enter, to thereby support said body portion.

7 In a brake shoe, a body portion comprising two sections arranged side by side and extending longitudinally of the shoe and which sections are provided each with a lug upon its rear face, and with a recess corresponding in size and form with said lug upon its front face, said lugs being in contact with one another and said recesses communicating with one another to form in effect a single lug and recess; and a detachable back having means for engaging the lug of both of said body sections.

8. In a brake shoe, a body portion comprising two sections arranged side by side and extending longitudinally of the shoe and which sections are provided each with a tapered lug upon its rear face, and with a recess corresponding in size and form With said lug upon its front face, said lugs being in contact with one another and said recesses communicating with one another to form in effect a single lug and recess; and a detachable back having an opening corresponding in form with the combined lug formed by the lugs of both said body portions and which opening is adapted to receive said lugs.

9. A brake shoe comprising a body portion, said body portion composed of a plurality of separable sections extending longitudinally of the shoe and provided with projections collectively forming a lug.

10. A brake shoe comprising a body por-' tion, said body portion composed of a plurality of separable sections extending longitudinally of the shoe and provided with projections collectively forming a lug, and a supporting back detachably engaging said lug.

11. A brake shoe comprising a body portion made up of a plurality of longitudinal sections, each provided with rearwardly'extending projections collectively forming a lug, and with corresponding recesses on the wearing faces of said sections.

12. A brake shoe comprising a body portion made up of. a plurality of longitudinal sections, each provided with rearwardly extending projections collectively forming a lug, and with corresponding recesses on the wearing faces of said sections, and a back detachably engaging said lug, the said body sections together.

13. A brake shoe, a body portion comprising a plurality of longitudinally extending separable sections, each being provided with rearwardly extending projections collectively forming a lug tapering toward its extremities, and a back with separable portions with tapering openings therein adapted to wedgedly engage said lug.

Signed at New York, borough of Manhattan, in the county of New York and State of New York, this 31st day of July, A. D. 1913.

JOSEPH D. GALLAGHER.

Witnesses:

MARY B. JUSTICE, ANNA V. WALSH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

and holding 

